
Installation & User Manual - Sampling Systems
Version 140618 UK
Page 38
9.3
Principle of operation
1)
Purge:
When taking a sample the sampler starts purging the suction
hose during a set time (parameter Purge time, default 8 seconds). This
is to remove the old medium from the suction hose trough the inlet.
2)
Suction:
The samplers starts creating a vacuum on the inlet until
medium reaches the medium detector (A in fig 9.3a). When the
sampler doesn’t detect the medium within a set time (parameter Max
Suction time, default 30 seconds), an error sample is counted.
3)
Dose:
After the medium is detected the sampler doses the medium
during a set time (Dose time: 8 seconds default).
4)
Rinse:
When a sample is dosed, the peristaltic pump creates pressure
again on the inlet to rinse all the excess water from the tubing inside
the pump and suction hose all during a set time (Parameter RinseT,
default 10 seconds).
9.4
Installation instructions
Follow the following procedures during installation:
•
Connect the suction hose to the supplied suction hose coupling..
Feed the hose through the inlet and fasten the gland air tight.
•
Mount the end (inlet) of the suction hose on a fixed
representative turbulent point to sample homogeneous
wastewater. Ensure the suction hose is always emerged in the
wastewater / medium.
Keep in mind:
•
Maximum suction height: 8 meter
•
Maximum suction length: 30 meter
Purge
Suction
Dose
Rinse
Fig. 9.3a
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